Paper bag



(Model.)

L. D. BENNER.

PAPER BAG.

No. 397.217. Patented Feb. 5, 1889.

nmmLin-u m. Wnhingion. n. c.

UNITED STATES FFICE.

PATENT LORENZO D. BENNER, OF PEORIA, ILLINOIS,ASSIGNOR TO THE UNIONPAPER BAG MACHINE COMPANY, OF PHILADELPHIA, PENNSYLVANIA.

PAPER BAG.

SPECIFICATION forming part of Letters Patent No. 397,217, dated February5, 1889.

Application filed March 10, 1888. Serial No. 266,798- (ModeL) To allwhom it may concern.-

Be it known that I, LORENZO D. BENNER, a citizen of the United States,residing at Peoria, Illinois, have invented certain new and usefulImprovements in Paper Bags, fully set' forth in the followingspecification and represented in the accompanying drawings.

This invention relates to that class of paper bags commonly designatedbellows-sided IO or square bags-that is to say, those bags in which thebody portion when in its flat condition is partially formed by foldinginwardly the opposite side portions of the material which, when the bagsare distended, open I 5 out and form two of their sides and. impart asquare shape thereto.

The invention particularly relates to an improved form of bottom forsuch bags; and it consists in the bag having thebottom hereinafter setforth.

In the drawings, Figure 1 is a perspective view of a bellows-sidedbag-length adapted to the formation of the improved bag-bottom. Fig. 2is a plan view of an end portion of the same, illustrating certainextensions of the material with which the bag-length is preferablyprovided. Figs. 3 to 5, inclusive, illustrate perspective views of amode in which the improved bottom may be formed. Fig. 6

is a similar view, the bag being completed.

7 and S are sectional details taken, re-

spectively, on the lines 6 U and 7 7 of Fig. 6.

Fig. 9 is a perspective view of the bag distended and looking at itsbottom. Fig. 10 is 3 5 a modified form of the bag-length hereinafterdescribed. Fig. 11 is a vertical section taken on the line 9 9 of Fig.9. Fig. 12 is a view similar to Fig. 9, portions of the folds beingbroken away to show the underlying portions.

The manner in which a bellows-sided tube is formed and bag-lengthssevered therefrom preliminary to the formation of the bag-bot toms isnow too well known to need particularizing here, and it will suffice tosay that any of the well-known methods heretofore employed in theformation of such a tube and bag-lengths may be practiced in making thepresent improved bag, and that the improved bag may also be made fromblanks of the de- 0 sired size folded up into bellows-sided form or intoH shape, as will be apparent.

'forth in United States Letters Patent dated May 15, 1888, No. 382,682,to which reference may be had.

In forming the improved bag the bag-length will in its preferred form beprovided with extending portions a, Figs. 1 and 2, formed by cutting thematerial composing the bellows 6o sides on lines varying from thetransverse line upon which the remainder of the material. is cut. Theseextending portions serve to expose the material composing the bellowssides and enable paste to be readily applied thereto, to insure theproper and effectual sealing of the plies forming the bottom of the bag,and to provide a proper extension of the material for enveloping the endof the bagbody, as will hereinafter appear. This particular form ofextending end portions, however, is not essential, as the same effectmay be produced by cutting the end of the baglength in the manner shownin Fig. 10, the difference being that a little more material will befolded over onto the body of the bag when its bottom is completed.

The manner found by me most suited in practice to the forming of thebottom folds is to distend the bellows sides of the bag-length inopposite directions at right angles to the remaining portion of thebag-length, and thus expose or open out the ends 9 h of said sides, or,in other words, to fold it into H shape in transverse section, as shownin Fig. 3, and as particularly set forth in my said application. hen inthis form, or when in its fiat condition, as in Figs. 1, 2, and 10, thebody of the bag-length may be provided with diagonallyarranged creasedlines b, by which the lines upon which the bottom-forming portionsthereof will fold are defined. This preliminary creasing, however, isnot essential, as antomatic devices may be employed, which would rendersuch creases unnecessary. To a more ready understanding of the manner inwhich the bottom folds are formed, it will be assumed for the purposesof this descrip tion that such creases will be first imparted to thebag-length.

The distance from 1 to 2, Figs. 1, 2, 3, and 10, will correspond to thelength of material form= ing the enveloping fold (2, F 5 and '7 whichultimately lies over the open end of the baglength, and hence inpractice the diagonal lines I) on each side of the bag-length shouldcommence at the point 2, so that the said fold c will lie snugly againstthe edges of the adjacent plies e i at the open end of the baglength, asin Fig. 7, and thus permit their edges to abut when the completed bag isdistended, as seen in Fig. 11. (The diagonal creased lines I), it may bestated, should extend approximately at an angle of about forty-fivedegrees from the longitudinal side of the bag-length, as indicated inFig. 2.) The opposite sides g 71. each provide portions in n, formed bythe end of the baglength and the creased lines I), and, sepa rated bythe fold-line 0, form the portions which properly close the end of thebag length. In the mode taken for illustration the ends of said portionsor n of each side are turned toward the center of the blank end on saidcreased lines I), as in Fig. -11, in the act of bringing the fold-linesagainst the open end thereof. As these portions are broughtin contactwith said open end, one will slightly overlap the other, as indicated inthe completed bag, Figs. (5 and 9. \Vhen this is done, the portions orand a may be brought down to lie flat upon the underlying portions, asin Figs. 6 and 7, by directing the longitudinal sides of the bag-lengthfrom their vertical position shown in Fig. l to the flat position shownin Fig. (3. This will effectually cause the fold e to lie adjacent tothe end of the, bag-length, and bring the entire extent of said portionsin and a down snugly upon the underlying portionsof the bag-length, andby suitable lines of paste applied to their under surfaces be caused toadhere thereto and to each other at their overlapping points, andcomplete the formation of the bag.

Thus it will be seen that the opposite under- I lying portions 0' s oftwo sides of the baghave i l l their portions 7; Z turned back thereoveron the diagonal lines Z), and that the portions of the remainingopposite sides are turned over upon said underlying portions 1' .9, andoverlap each other in the center of the bag-lmttom.

It is not necessary that the bottoiii-forming portions m it upon bothsides should be simultaneously folded over, as the portions upon on e 1side of the bag-length might be first folded. over onto the body of thebag-length, as in Fig. 5, and the other side afterward manipulated andfolded in like manner. Neither it essential that the bag-length beiirstformed in the bellows-sided flat form, as shown in i Figs. 1 and 2,as it may be formed directly into the H shape shown in Fig.

The bag thus formed provides an exceedingly merchant-able article,obviating the ne cessity of any hand manipulation of its bot tom inorder to properly distcnd it in the act of opening the bag.

The diagonal creases extending across the material of the bellowssides,now universally recognized as .in'iportant to the effectiveopening of the bag, are in the improved bag necessarily formed by thefolds elosin g the bagbottom.

Specific forms of bag-bottom having the same general characteristics asthose herein set forth and claimed are shown and claimed in my pendingapplications, filed May 20, 1887, Serial No. 238,876, and February 3,1888, Serial Xo. 262,890. The claims herein made are intended to cover,broadly, a bag-bottom formed by turning the opposite portions of thematerial lying within the bellows sides over toward. the center of thebag-bottom, so as to overlap each other upon the body of the bag.

What I claim is 1. The herein-deseribed square bag, havin a bottomformed of theopposite side portions, 9 71., extendin from the bellowssides toward the center of the bag-bottom, so as to overlap each otherand the opposite portions 7' s of the other sides of thebag,substantially as de- 1 scribed.

2. The herein-described square bag, having a bottom formed of theopposite side portions, g h, extending from the bellows sides toward thecenter of the bag-bottom, so as to overlap each other and the oppositeportions 1' s of the other sides of the body of the bag, said oppositeside portions having diagonal fold-lines b, substantially as described.

3. A bellows-sided bag having a bottom formed of opposite side portions,g h, extending from the bellows sides toward the center of thebag-bottom and overlapping each other, and the opposite portions 7" s ofthe other side of the bag-body extending therefrom toward the center ofthe bag-bottom, the portions kl of the portions 1' .5- being folded backthereupon on diagonal lines extending from the sides of the bag,substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing witnesses.

LORENZO l). .BENXER.

Wiinesses:

PETER F. HARMON, GEO. H. PULLMAN.

